the cap thread is M14x1, barrel inside thread for the nib housing 10x1...i'm not really up on my nib size numbers..i just went through the warehouse and grabbed one...it is pretty small..i believe its the same nib that a Majestic Jr. uses...overall length about 6.2 (a little long) cap about 2.7"- OD .693", bottom barrel about 3.8"- OD .6", nib housing 1" w threads...